Corrections

Question 1

Larger mass means what about field lines in electric fields

Answer 1

Closer together

Question 2

Escape velocity

Answer 2

Potential energy x 2 = v²

Ve= root(2GM/r)
Ve=root(2rg)

Question 3

Work done on a gas

Answer 3

Area under pressure volume graph

P x change in V

Question 4

Tesla

Answer 4

The strength of the magnetic field that produces a force of 1 Newton in a wire of 1 meter with 1 Ampere flowing perpendicular to the field

Question 5

Why can’t protons be accelerated in Ds

Answer 5

Magnetic field can only change the particles direction/does no work on proton
Force is perpendicular to the motion of velocity/no force component in direction of motion

Question 6

Time period for Ds/cyclotron

Answer 6

Semi circle=pim/BQ

BQv=mv²/r
v=2pir/T for a full circle, pir/T for half

Question 7

What happens when a neutron hits moderator

Answer 7

Undergoes an elastic collision/bounces off with less kinetic energy so speed decreased

Question 8

Why may field lines converge

Answer 8

Field stronger since lines together closer

Higher density than surrounding material

Question 9

Why will something speed up when moving towards field lines that converge

Answer 9

Accelerates

Since potential is lower

Question 10

A continuous stream of water falls through a vertical distance of 100 m.
Assume no thermal energy is transferred to the surroundings.
The specific heat capacity of water is 4200 J kg−1 K−1
.
What is the temperature difference of the water between the top and bottom of the
waterfall?

Answer 10

Gravitational potential energy into kinetic energy and then finally thermal energy

mgh=mcT
T=gh/c